Donald Trump's administration on Saturday appealed a federal judge's order that blocked the US president's ban on travelers from seven Muslim-majority nations.

The Justice Department appeal comes one day after a US district judge filed a nationwide order halting the ban's implementation. Since then, the Department of Homeland Security has reverted to standard, previous procedure in admitting people from the affected countries.

The Department of Justice declined to comment on the appeal "beyond the filing at this time," in an email to AFP.